Implemented resource regeneration computation in the
verse.compute_provider_regeneration() function.
Created the PLANET_RES_REGEN update type, and added the corresponding
implementation.
Added resource regeneration constants registration.
* Added defs.uoc_resources() set of functions which create or update
basic resources.
* Added defs.uoc_natural_resources() set of functions which create or
update natural resources.
* Added in-base logging through a foreign data wrapper, which is only
possible using PostgreSQL 9.1
* Renamed database-related configuration files to indicate that they are
samples, and added the "real" names to the Git ignore list. Server
distribution modified accordingly.
* Removed PL/PgSQL registration (it was only necessary on 8.4)
* Added pgTAP SQL definitions and a script which will (hopefully) be
executed by the build system after the main Java build in order to
execute database unit tests. The script supports both admin- and user-
level testing. I also added a few tests to make sure the testing framework
actually runs them.
* Added documentation about the database definitions structure
